Centrifugal speed-governor



(No Model.) 1

O. R. McGAHBY. GENTRIPUGAL SPEED GOVERNOR.

N0. 527,443. Patentd 0011.16; 1894.

V I aw tachably and adj ustably connected with the This eccentric has anoblong slot e as seen in UNITED STATE CALVERT R. MCGAI-IEY,

PATENT OFFICE.

OF ELKTON, VIRGINIA.

CENTRIFUGAL SPEED-GOVERNOR.

:EPECIFIGATION forming part of Letters Patent No. 527,443, dated October16, 1894.

Application filed January 9, 1894" To aZZ whom it may concern.-

Be it known that I, CALVERT R. MCGAHEY, a citizen of the United States,residing at Elk ton, in the county of Rockingham, State of Virginia,have invented certain new and useful Improvements in CentrifugalSpeed-Gov? ernors, of which the following is aspecitication, referencebeing had therein totthe accompanying drawings.

This invention relates to certain new and useful improvements in speedgovernors for steam engines, and it has for its object among others toprovide asimple and cheap governor which shall be positive and reliableas well as efiicient in its operation, and so constructed that any ofthe parts may be readily replaced by new ones whennecessary or detachedfor the purpose of repairs.

Other objects and advantages of the invention will hereinafter appearand the novel features thereof will be specifically defined by theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which- Figure 1 is aside elevationot my improvement, with the shaft shown in cross section. Fig. 2 is a cross sectionof the same on the line 2-2 of Fig. 1.

Like letters of reference indicate like parts in both of the views.

Referring now tothe details of the drawings by letter, A designates theshaft to which is keyed the wheel B.

C is the rod designed for connection with the cut-off valve. (Notshown.) This rod is destrap D which is held around the eccentric E asseen in Fig. 2, preferably by means of a tongue and groove connection asshown in Fig. 2.

both views in which the shaft A works, and the said eccentric hasfurther an extension e of its hub which is also provided with acoincident oblong slot 6 as is clearly shown in Fig. 2. F is abell-cranklever which is mounted to embrace this extension e as seen in Fig. 2,and this bell-crank lever F has an arm or extension f which is pivotedat f to the wheel B Serial No. 496,289. (No model.)

as shown in Fig. 1, and this bell-crank lever is further provided with alonger arm F at substantially a right angle to the arm f, as shown inFig. 1 and to the outer end of this long arm is pivotally connected asat g, one end of the link G the other end of which is pivotallyconnected as at h with the bellcrank lever H which is pivotally mountedas at i on a lug I on the wheel B and the other arm of this leverisprovided with arod J upon which is adj ustably mounted a weight K whichmay be held in its adjusted position in any suitable manner, as by a setscrew j, as shown in Fig. l.

L is a plate which encircles the shaft A and has an oblong slotZcoinciding with the slots '6 and e as seen in Fig. 2and is secured tothe hub of the eccentric E in any suitable manner as by screws Z as seenin Fig. 2, and serving to hold the bell-crank lever F againstdisplacement. This plate L has an extension or arm L arrangedsubstantially ata right angle to the arm F as seen in Fig. l and theouter end of this arm or extension is pivotally and adjustably held tothe wheel B as seen at Z M is a spring connected at one end with the armF between its ends and at the other end adj ustably'connected with thewheel B in any suitable manner, such for instance as shown in Fig. 1wherein it is shown as connected with a nut m adj ustably mounted on thescrew rod M projecting inward from the rim of the wheel. I

With the parts constructed and arranged substantially as above set forththe operation will be readily understood, especially when taken inconnection with the annexed drawings. As the speed of theengineincreases the weight K is thrown out which draws upon the lever H,link G and arm F to actuate the rod 0 and shut off the steam. The oblongslots permit of the necessary movements of the parts.

The weight K can be easily adjusted as occasion may require. The springM normally holds the parts in their proper position and returns them tosuch position after the rod 0 has been moved to shut 01f the steam whenabnormal speed has been attained.

toe

Modifications in detail may be resorted to without departing from thespirit of the invention or sacrificing any of its advantages.

What I claim as new is 1. The combination with the wheel and its shaft,of the bell-crank lever having an arm pivoted on the Wheel-and an arm atright angles thereto, a weighted lever connected with the last-mentionedarm, and an eccentric conneoted with the cut-off valve and about whichthe bell-crank lever works, as set forth.

2. The combination with the Wheel and its shaft, of a bell-crank leverhaving two arms one of which is pivoted on the wheel, apivoted leverconnected with the other arm and carrying a weighted rod, and aneccentric having a hub about which the bell-crank lever Works andcarrying a rod for connection with the cut-off valve, as set forth.

3. The combination with the wheel and its shaft, of the bell-crank leverhaving two arms at right angles to each other, the lever carryingaWeighted rod and pivotally connected with one of said arms, and aneccentric carryinga rod for connection with the cut-0E valve and havingan eccentric hub, substantially as and for the purpose specified.

4. The combination with the eccentric having an eccentric hub and oblongslot, of the wheel and its shaft passed through said slot, thebell-crank lever mounted on the eccentric hub, a pivoted lever connectedwith an arm of said bell-crank lever, and a weighted rod carried by saidlever, as set forth.

5. The combination with an eccentric having an eccentric hub withcoincident oblong slots in the eccentric and hub, of a bell-crank leveron the said hub, a pivoted lever connected with an arm on said bellcrank-lever, and a weighted rod on the pivoted lever, as set forth.

6. The combination with the eccentric with its eccentric hub and strapconnected with thecut-off valve-rod, of the bell-crank lever on the saidhub and having two arms one of which is pivotally connected with thewheel, and the plate connected with the said hub and hav-' ing an armconnected with the wheel, as set forth.

7. The combination with the wheel and its shaft, of the eccentric witheccentric hub and oblong slot, the belhcrank lever on said hub andhaving two arms one of which is pivotally mounted on the Wheel, thelever pivot- CALVERT R. MOGAHEY.

Witnesses:

W. K. JENNINGS, J. E. Lone.

